Search for elements 119 and 120

J. Khuyagbaatar; A. Yakushev; Ch E. Düllmann; D. Ackermann; L. L. Andersson; M. Asai; M. Block; R. A. Boll; H. Brand; D. M. Cox; M. Dasgupta; X. Derkx; A. Di Nitto; K. Eberhardt; J. Even; M. Evers; C. Fahlander; U. Forsberg; J. M. Gates; N. Gharibyan; P. Golubev; K. E. Gregorich; J. H. Hamilton; W. Hartmann; R. D. Herzberg; F. P. Heßberger; D. J. Hinde; J. Hoffmann; R. Hollinger; A. Hübner; E. Jäger; B. Kindler; J. V. Kratz; J. Krier; N. Kurz; M. Laatiaoui; S. Lahiri; R. Lang; B. Lommel; M. Maiti; K. Miernik; S. Minami; A. K. Mistry; C. Mokry; H. Nitsche; J. P. Omtvedt; G. K. Pang; P. Papadakis; D. Renisch; J. B. Roberto; D. Rudolph; J. Runke; K. P. Rykaczewski; L. G. Sarmiento; M. Schädel; B. Schausten; A. Semchenkov; D. A. Shaughnessy; P. Steinegger; J. Steiner; E. E. Tereshatov; P. Thörle-Pospiech; K. Tinschert; T. Torres De Heidenreich; N. Trautmann; A. Türler; J. Uusitalo; M. Wegrzecki; N. Wiehl; S. M. Van Cleve; V. Yakusheva

doi:10.1103/PhysRevC.102.064602

Search for elements 119 and 120

J. Khuyagbaatar, A. Yakushev, Ch E. Düllmann, D. Ackermann, L. L. Andersson, M. Asai, M. Block, R. A. Boll, H. Brand, D. M. Cox, M. Dasgupta, X. Derkx, A. Di Nitto, K. Eberhardt, J. Even, M. Evers, C. Fahlander, U. Forsberg, J. M. Gates, N. GharibyanP. Golubev, K. E. Gregorich, J. H. Hamilton, W. Hartmann, R. D. Herzberg, F. P. Heßberger, D. J. Hinde, J. Hoffmann, R. Hollinger, A. Hübner, E. Jäger, B. Kindler, J. V. Kratz, J. Krier, N. Kurz, M. Laatiaoui, S. Lahiri, R. Lang, B. Lommel, M. Maiti, K. Miernik, S. Minami, A. K. Mistry, C. Mokry, H. Nitsche, J. P. Omtvedt, G. K. Pang, P. Papadakis, D. Renisch, J. B. Roberto, D. Rudolph, J. Runke, K. P. Rykaczewski, L. G. Sarmiento, M. Schädel, B. Schausten, A. Semchenkov, D. A. Shaughnessy, P. Steinegger, J. Steiner, E. E. Tereshatov, P. Thörle-Pospiech, K. Tinschert, T. Torres De Heidenreich, N. Trautmann, A. Türler, J. Uusitalo, M. Wegrzecki, N. Wiehl, S. M. Van Cleve, V. Yakusheva

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Abstract

A search for production of the superheavy elements with atomic numbers 119 and 120 was performed in the Ti50+Bk249 and Ti50+Cf249 fusion-evaporation reactions, respectively, at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. Over four months of irradiation, the Bk249 target partially decayed into Cf249, which allowed for a simultaneous search for both elements. Neither was detected at cross-section sensitivity levels of 65 and 200 fb for the Ti50+Bk249 and Ti50+Cf249 reactions, respectively, at a midtarget beam energy of Elab=281.5 MeV. The nonobservation of elements 119 and 120 is discussed within the concept of fusion-evaporation reactions including various theoretical predictions on the fission-barrier heights of superheavy nuclei in the region of the island of stability.

Original language	English
Article number	064602
Journal	Physical Review C
Volume	102
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.102.064602
Publication status	Published - Dec 2 2020

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1103/PhysRevC.102.064602

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Khuyagbaatar, J., Yakushev, A., Düllmann, C. E., Ackermann, D., Andersson, L. L., Asai, M., Block, M., Boll, R. A., Brand, H., Cox, D. M., Dasgupta, M., Derkx, X., Di Nitto, A., Eberhardt, K., Even, J., Evers, M., Fahlander, C., Forsberg, U., Gates, J. M., ... Yakusheva, V. (2020). Search for elements 119 and 120. Physical Review C, 102(6), [064602]. https://doi.org/10.1103/PhysRevC.102.064602

Khuyagbaatar, J, Yakushev, A, Düllmann, CE, Ackermann, D, Andersson, LL, Asai, M, Block, M, Boll, RA, Brand, H, Cox, DM, Dasgupta, M, Derkx, X, Di Nitto, A, Eberhardt, K, Even, J, Evers, M, Fahlander, C, Forsberg, U, Gates, JM, Gharibyan, N, Golubev, P, Gregorich, KE, Hamilton, JH, Hartmann, W, Herzberg, RD, Heßberger, FP, Hinde, DJ, Hoffmann, J, Hollinger, R, Hübner, A, Jäger, E, Kindler, B, Kratz, JV, Krier, J, Kurz, N, Laatiaoui, M, Lahiri, S, Lang, R, Lommel, B, Maiti, M, Miernik, K, Minami, S, Mistry, AK, Mokry, C, Nitsche, H, Omtvedt, JP, Pang, GK, Papadakis, P, Renisch, D, Roberto, JB, Rudolph, D, Runke, J, Rykaczewski, KP, Sarmiento, LG, Schädel, M, Schausten, B, Semchenkov, A, Shaughnessy, DA, Steinegger, P, Steiner, J, Tereshatov, EE, Thörle-Pospiech, P, Tinschert, K, Torres De Heidenreich, T, Trautmann, N, Türler, A, Uusitalo, J, Wegrzecki, M, Wiehl, N, Van Cleve, SM & Yakusheva, V 2020, 'Search for elements 119 and 120', Physical Review C, vol. 102, no. 6, 064602. https://doi.org/10.1103/PhysRevC.102.064602

@article{0cf94ee3ef8b444fa18f70bac16af623,

title = "Search for elements 119 and 120",

abstract = "A search for production of the superheavy elements with atomic numbers 119 and 120 was performed in the Ti50+Bk249 and Ti50+Cf249 fusion-evaporation reactions, respectively, at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. Over four months of irradiation, the Bk249 target partially decayed into Cf249, which allowed for a simultaneous search for both elements. Neither was detected at cross-section sensitivity levels of 65 and 200 fb for the Ti50+Bk249 and Ti50+Cf249 reactions, respectively, at a midtarget beam energy of Elab=281.5 MeV. The nonobservation of elements 119 and 120 is discussed within the concept of fusion-evaporation reactions including various theoretical predictions on the fission-barrier heights of superheavy nuclei in the region of the island of stability.",

author = "J. Khuyagbaatar and A. Yakushev and D{\"u}llmann, {Ch E.} and D. Ackermann and Andersson, {L. L.} and M. Asai and M. Block and Boll, {R. A.} and H. Brand and Cox, {D. M.} and M. Dasgupta and X. Derkx and {Di Nitto}, A. and K. Eberhardt and J. Even and M. Evers and C. Fahlander and U. Forsberg and Gates, {J. M.} and N. Gharibyan and P. Golubev and Gregorich, {K. E.} and Hamilton, {J. H.} and W. Hartmann and Herzberg, {R. D.} and He{\ss}berger, {F. P.} and Hinde, {D. J.} and J. Hoffmann and R. Hollinger and A. H{\"u}bner and E. J{\"a}ger and B. Kindler and Kratz, {J. V.} and J. Krier and N. Kurz and M. Laatiaoui and S. Lahiri and R. Lang and B. Lommel and M. Maiti and K. Miernik and S. Minami and Mistry, {A. K.} and C. Mokry and H. Nitsche and Omtvedt, {J. P.} and Pang, {G. K.} and P. Papadakis and D. Renisch and Roberto, {J. B.} and D. Rudolph and J. Runke and Rykaczewski, {K. P.} and Sarmiento, {L. G.} and M. Sch{\"a}del and B. Schausten and A. Semchenkov and Shaughnessy, {D. A.} and P. Steinegger and J. Steiner and Tereshatov, {E. E.} and P. Th{\"o}rle-Pospiech and K. Tinschert and {Torres De Heidenreich}, T. and N. Trautmann and A. T{\"u}rler and J. Uusitalo and M. Wegrzecki and N. Wiehl and {Van Cleve}, {S. M.} and V. Yakusheva",

note = "Funding Information: We are grateful for GSI's Penning ion source and UNILAC staff, and the Experimental Electronics department for their continuous support of the experiment. This work was financially supported in part by the German BMBF (Grant No. 05P12UMFNE), the Helmholtz association (Grant No. VH-NG-723), the Helmholtz Institute Mainz, Swedish Research Council (Vetenskapsr{\aa}det VR Grants No. 2011-5253 and No. 2016-3969), the Australian Federal Government ARC (Grants No. DP170102318, No. DP170102423, and No. DP200100601), the US Department of Energy by LLNL (Grant No. DE-AC52-07NA27344), Vanderbilt University (Grant No. DE-FG05-88ER40407), and the Laboratory Directed Research and Development Program at LLNL (Grant No. 11-ERD-011). This work was cosponsored by the Office of Science, US Department of Energy (DOE), and supported under U.S. DOE Grant No. DE-AC05-00OR22725 (ORNL). material was provided by the U.S. DOE Isotope Program. Publisher Copyright: {\textcopyright} 2020 American Physical Society.",

year = "2020",

month = dec,

day = "2",

doi = "10.1103/PhysRevC.102.064602",

language = "English",

volume = "102",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "6",

}

TY - JOUR

T1 - Search for elements 119 and 120

AU - Khuyagbaatar, J.

AU - Yakushev, A.

AU - Düllmann, Ch E.

AU - Ackermann, D.

AU - Andersson, L. L.

AU - Asai, M.

AU - Block, M.

AU - Boll, R. A.

AU - Brand, H.

AU - Cox, D. M.

AU - Dasgupta, M.

AU - Derkx, X.

AU - Di Nitto, A.

AU - Eberhardt, K.

AU - Even, J.

AU - Evers, M.

AU - Fahlander, C.

AU - Forsberg, U.

AU - Gates, J. M.

AU - Gharibyan, N.

AU - Golubev, P.

AU - Gregorich, K. E.

AU - Hamilton, J. H.

AU - Hartmann, W.

AU - Herzberg, R. D.

AU - Heßberger, F. P.

AU - Hinde, D. J.

AU - Hoffmann, J.

AU - Hollinger, R.

AU - Hübner, A.

AU - Jäger, E.

AU - Kindler, B.

AU - Kratz, J. V.

AU - Krier, J.

AU - Kurz, N.

AU - Laatiaoui, M.

AU - Lahiri, S.

AU - Lang, R.

AU - Lommel, B.

AU - Maiti, M.

AU - Miernik, K.

AU - Minami, S.

AU - Mistry, A. K.

AU - Mokry, C.

AU - Nitsche, H.

AU - Omtvedt, J. P.

AU - Pang, G. K.

AU - Papadakis, P.

AU - Renisch, D.

AU - Roberto, J. B.

AU - Rudolph, D.

AU - Runke, J.

AU - Rykaczewski, K. P.

AU - Sarmiento, L. G.

AU - Schädel, M.

AU - Schausten, B.

AU - Semchenkov, A.

AU - Shaughnessy, D. A.

AU - Steinegger, P.

AU - Steiner, J.

AU - Tereshatov, E. E.

AU - Thörle-Pospiech, P.

AU - Tinschert, K.

AU - Torres De Heidenreich, T.

AU - Trautmann, N.

AU - Türler, A.

AU - Uusitalo, J.

AU - Wegrzecki, M.

AU - Wiehl, N.

AU - Van Cleve, S. M.

AU - Yakusheva, V.

N1 - Funding Information: We are grateful for GSI's Penning ion source and UNILAC staff, and the Experimental Electronics department for their continuous support of the experiment. This work was financially supported in part by the German BMBF (Grant No. 05P12UMFNE), the Helmholtz association (Grant No. VH-NG-723), the Helmholtz Institute Mainz, Swedish Research Council (Vetenskapsrådet VR Grants No. 2011-5253 and No. 2016-3969), the Australian Federal Government ARC (Grants No. DP170102318, No. DP170102423, and No. DP200100601), the US Department of Energy by LLNL (Grant No. DE-AC52-07NA27344), Vanderbilt University (Grant No. DE-FG05-88ER40407), and the Laboratory Directed Research and Development Program at LLNL (Grant No. 11-ERD-011). This work was cosponsored by the Office of Science, US Department of Energy (DOE), and supported under U.S. DOE Grant No. DE-AC05-00OR22725 (ORNL). material was provided by the U.S. DOE Isotope Program. Publisher Copyright: © 2020 American Physical Society.

PY - 2020/12/2

Y1 - 2020/12/2

N2 - A search for production of the superheavy elements with atomic numbers 119 and 120 was performed in the Ti50+Bk249 and Ti50+Cf249 fusion-evaporation reactions, respectively, at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. Over four months of irradiation, the Bk249 target partially decayed into Cf249, which allowed for a simultaneous search for both elements. Neither was detected at cross-section sensitivity levels of 65 and 200 fb for the Ti50+Bk249 and Ti50+Cf249 reactions, respectively, at a midtarget beam energy of Elab=281.5 MeV. The nonobservation of elements 119 and 120 is discussed within the concept of fusion-evaporation reactions including various theoretical predictions on the fission-barrier heights of superheavy nuclei in the region of the island of stability.

AB - A search for production of the superheavy elements with atomic numbers 119 and 120 was performed in the Ti50+Bk249 and Ti50+Cf249 fusion-evaporation reactions, respectively, at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. Over four months of irradiation, the Bk249 target partially decayed into Cf249, which allowed for a simultaneous search for both elements. Neither was detected at cross-section sensitivity levels of 65 and 200 fb for the Ti50+Bk249 and Ti50+Cf249 reactions, respectively, at a midtarget beam energy of Elab=281.5 MeV. The nonobservation of elements 119 and 120 is discussed within the concept of fusion-evaporation reactions including various theoretical predictions on the fission-barrier heights of superheavy nuclei in the region of the island of stability.

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UR - http://www.scopus.com/inward/citedby.url?scp=85100124980&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.102.064602

DO - 10.1103/PhysRevC.102.064602

M3 - Article

AN - SCOPUS:85100124980

SN - 2469-9985

VL - 102

JO - Physical Review C

JF - Physical Review C

IS - 6

M1 - 064602

ER -

Search for elements 119 and 120

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